Demon didn't always mean evil. Sometimes, they were helpful and even inspirational. Now you can carry your favorite little demon with you.
Who better to start with than my own personal favorite, Sitri!

You don't have to be an atheist to want to keep science in science class. Sarcastically urging schools to teach other pseudosciences, myths and discredited theories is a fine way to show your pro-science stance. Darwin would be proud!

“The emotions that are locked away deep inside Mob’s heart expand little by little. However, there is a limit to how much his emotions can take before leaking out and going wild.”
This design was digitally redrawn in vector by hand. I take no credit over the original work from the series.